SECTION II
Deep Wall Installation
If wall is thicker than allowed in the notes in
Figure 2,
a sheet
metal wall sleeve extension and flashing
MUST
be used. See
Figure 4
for guidelines to use in fabricating a wall sleeve ex-
tension.
Field Fabricating A Sleeve Extension
The Following points
MUST
be considered when designing a
wall sleeve extension.
1. Provision must be made to direct excess condensate from
the back of the wall sleeve to the outside of the build-
ing.
2. Air baffles must be mounted to properly direct air flow
from the condenser.
3. Wall Sleeve Extension design must allow for the proper
mounting of the louvers.
4. Caulking of all potential sites where condensate or external
water could infiltrate into building is required.
5. Seal strips must be attached to the outside edge of the
vertical baffles.
Figure 4.
Extended Wall Sleeve and Sealant Locations
IMPORTANT NOTE: The silicone bead MUST extend 3" up
the side of the two flanges to prevent condensate from
leaking.
42 X 16" Frame, 20 gauge minimum,
painted or aluminium
Sealant inside (4)
bottom corners
Condensate
Notches
Condensate
Drip Panel
(Field
Supplied)
Drip
Edge
Width of wall
Wall Sleeve
Outside Edge
Insulation
Air Baffles
6. Condensate notches are clear of sealant so condensate
flows freely into extension.
NOTE:
Improper fabrication of a wall sleeve extension will
impair PTAC performance. Regardless of your final extended
wall sleeve design, provision
MUST
be made for proper direc-
tion of air flow and condensate.
Extension Installation
Size wall sleeve extension to fit frame opening. Secure it to the
wall sleeve before installing in the wall. Refer to
Figure 4
for a
guide for fabrication of a condensate drip panel. Panel
MUST
extend the full depth of the wall sleeve
and
the wall sleeve
extension. Pay particular care in sealing and caulking the panel
where it makes contact with the wall sleeve (see
Figure 4
.)
After installation in the wall, secure with fasteners through the
sides. Seal around the sleeve extension with exterior caulking.
Using a good grade of silicone sealant, seal all exposed screw
heads. When installation is complete, outside louver may be
attached to wall sleeve extension.
920-078-01 (12-04)
